TIME-SERT1812CORE M8x1.25 GM Rocker thread repair

Title says for GM rocker arm holes, but my Silverado 6.0L rocker hole threads are about 18mm - 20mm deep and they send in this kit inserts that are only 11.8mm.... Hope this holds... I went with these because supposed to be better than HeliCoils, but I hope the short insert length holds up over time... I could have got HeliCoil inserts that are plenty long enough, so I hope I didn't just spend 4 times the money for a half quality length alternative... Fingers staying crossed...

Sooo much easier than helicoils. Worked great and I’ve repaired 8 rocker bolt holes so far and the included tools still work like new. If you need more inserts than what comes in the kit, make sure you order the correct inserts. It seems the inserts with this kit are specific for this application. I had extra inserts that the depth and threads match but the shoulders were slightly larger than the inserts in this kit. Those larger shoulders won’t pass through the hole that the bit in this kit makes.

Used these for repairs to thread damage to the block from faulty roller rocker arm assemblies on a 2003 Buick Century... Far better than a helicoil and a permanent repair. Works flawlessly now. Note that this item is to specifically deal with this issue on a GM. The similar kit will not work...

A little pricey, but definitely worth it. It takes a major issue and turns it into an easy repair! Used it to fixed a pulled rocker bolt hole on a 3.4l in a 2008 Equinox. Still cheaper than replacing the head!

The Time Sert kit was very well machined , instruction sheet very simple and to the point and worked perfect, my 2003 3.4 Olds was back on the road in a day.

Super easy to use and a really neat kit. Way better thread repair system than anything out there

I loved the quality of this kit. I feel confident sending my customers down the road after I have made a repair using this kit. Will deffinatly buy more.

great product very pure